---
title: Manage config (datafile)
slug: feature-experimentation/docs/manage-config-datafile
docTags: 
createdAt: 2026-08-05T20:39:58.000Z
---

## OptimizelyConfig management

The datafile contains all the data needed to deliver and track your flag rules, including your A/B tests and flag deliveries. [Learn how to get the datafile](docId:8_kRh18IHN_0bW1xf7jYv).

You have the following options for synchronizing the datafile between your project and your application:

- **Pull method (recommended)** – The SDKs automatically poll for the latest datafile at a configurable interval.
- **Push method** – Use [webhooks](docId\:fxs-QgSDWJiHQc0JQ1Y0C) to fetch the latest datafile when your project configuration changes.
- **Custom method** – Fetch the datafile directly using the Optimizely CDN link. See [Get the datafile](docId:8_kRh18IHN_0bW1xf7jYv).

Other important considerations for datafile management include:

- Caching and persistence (Feature Experimentation mobile SDKs offer datafile offline caching and persistence).
- Synchronization between SDK instances, see [Multiple SDK implementations](docId\:qnt_DGgMVhpq-GXr3gqje).
- Network availability

:::hint{type="info"}
**Note**
To ensure webhook requests originate from Optimizely, [secure your webhook](docId\:fxs-QgSDWJiHQc0JQ1Y0C) using a token in the request header.
:::